"Old fire soup" has the functions of health care and dietotherapy, and the materials must be properly matched. Meat should be degreased and deodorized for many times, and medicinal materials should be washed and brewed for many times, and then cooked for a long time at a suitable temperature. The secret seasoning formula, fire throat, time and stew should be very particular and meticulous, otherwise it will not only fail to exert its efficacy, but also waste valuable medicinal materials. A pot of good old fire soup needs to be stewed for at least 3-5 hours. Most of the soup materials are dissolved in the soup, and the soup is turbid and sweet. However, the soup has become incomplete and tasteless due to long-term boiling. The taste of the soup you drink is made of soup without any unnatural seasoning. Traditional Chinese medicine believes that the old Tang fire has dietotherapy value. Different soups should be prepared in different seasons, and soups with different materials should be drunk in different constitutions to achieve dietotherapy effect ... Taking old Tang Huo as the dining hall is the diet culture of Cantonese people, and Hong Kong people attach great importance to cooking old Tang Huo. This cooking method, which combines the essence of food and medicine, thoroughly implements the Chinese concept of "taking food as a supplement". Good soup is not only delicious but also beneficial. Hong Kong people integrate dietotherapy into their lives and drink soup all the year round! Drinking a bowl of old fire soup is time-consuming and laborious, just like a continuous battle. Even though Hong Kong people are busy, everyone is energetic, good-looking and healthy, but they are not bloated every day. In order to strengthen the health and competitiveness of employees, even some companies in Hong Kong often order old fire soup as afternoon tea for employee welfare. Therefore, it is important to insist on drinking good soup.